Use XP. I always buy latest computer notebook but got real mad with my vista. Always hang when closing my microsoft applications. Sometimes during my powerpoint presentation also hang.
XP is so stable that I have no choice but to buy another computer with XP.
With vista, I got a lot of problem with the installation of my HP laser printer, always error message.
I even gave away my latest notebook with vista to my maid when she goes back. If u go vista web site, they will not give u 100 reasons to get vista but 1000s. This is called marketing.
Anyway, it is the interface that makes the computer look more "in" or cool. Ultimately, what we want is stability, isn't it?